Oil-stove



R. HOFFMAN.

OIL STOVE.

APPLICATION FILED M AY 3. 1917. l Mjw www@ muy wm.,

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Specification of Letters Patent.

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Application `filed May 3, 191'?. Serial No. 166,034.

To all whom concern:

Be it lrnown that I, RUDOLPH Horne/MN, a citizen of the United States, residing at Kankakee, in the county of Kankakee and @tate of llllinois, have invented certain new and useful Improvements in Uil-Stoves, of which the following is a specification rl`he burners of oil stoves are provided with. chimneys for directing the current of heated air and products of combustion toward a utensil to be heated, and in order to reduce the radiation of heat from the chimney, a drum may be employed, which `surrounds the chimney and is secured thereto. The chimney and drum thus provided are supported upon the burner so as to be capable of being tilted thereon, in order to permit of access to the burnerfor `lighting or other purposes, and it will be apparent that in order to permit of such tilting movement of thechimney and drum,

`it is essential that they terminate at their upper ends a material distance below the grate upon which is supported the utensil Accordingly, much heat is permitted Ato escape from the upper end ofthe chimney and drum without doing any appreciable amount of useful work. rlhe object of the present invention therefore is to minimize such radiation and insureithat as much as possible of the heat generated by the burner shall be applied 'to useful work.

ln the drawings, Figure 1 is a fragmental vertical sectional view of an oil stove embodying the features of myinvention. Fig. 2 is a fragmental front elevation.

3 3 of Fig. 1. Fig. e is a section on line 4--41 of Fig. 1.

ln the drawings, 1 denotes a bleed-lame `wiclr oil burner of any suitable type. 2 is a chimney of any ordinary or desired form resting upon an annular shoulder 3 upon the burner. l is a stove top provided with the usual grate 4a to support the utensil or other article to be heated. rlhe chimney 2 extends relatively near the stove tcp Ll so as to conduct the heated air and combustion products close to the bottom of the vessel to be heated. i

To minimize the radiation of heat from.

the chimney 2, l surround the chimney with a drum 5. The chimney and the drum may be connected together' in any suitable manis a sectional view taken in the plane of line` ner. ln the present embodiment thev are united at their lower ends by electrid spot welds.

rll`he chimney 2 is shown as being upwardly tapered, so as to provide an annular space between the chimney and the drum. lo provide for the entrance of air to the space (i a suitable number of openings 'i are formed in the lower portion 'of the drum.

A handle 8 of any preferred construction is attached to the drum. Herein the handle is shown Aas secured. in place by bolts 9 and 10 extending through the drum and the chimney. 11 is a spacer on the bolt S) between the chimney and the drum.

',lhe drum 5 comprises a lower or main section 5a of about the same lengt] as the chimney 2, and an upper section 5b surrounding the main portion of the drum and moi/ably supported thereon in any suitable way. Herein are shown three equidistant pins 13 set in the main portion of the drum and extending into upwardly inclined slots 11i in the section 5". 15 is a handle by means of which the section 5b may be turned to the extent limited by the length of the slots 14. As the section 5b is turned it rises or descends, depending upon the direction of turning movement. Any suitable means may be used to retain the section 5b in adjusted position, as, for example, notches 16 in the upper wall of one of the slots 1li, the pin 13 entering any `of said notches.

It will be apparent that when `the upper section 5l is in its lowermost position the drum may be readily tilted to permit of access to the burner, for lighting or other purposes, but when in its most elevated position, the section 5h is preferably in contact with or very close to the lower side of the grate da, so that it is prevented by the grate'from being tilted. To insure suflicient means of escape for the heated air and products of combustion, the upper portion of the section 5i? is preferably provided with a series of perforations 17.

Preferably registering windows 18 are provided in the chimney and the drum, near the lower ends thereof.

y ln use, the hot gases are directed to the grate la by the chimney 2. rl`he heat radiated from the chimney warms the air in the space 6, and causes an upward current of air in said space, said heated current being discharged close to the utensil .being heated. The comparatively cool air drawn in through the openings 7 prevents overheating of the burner and the lower part oll the chimney. When the burner is to be lighted, the section 5l is lowered, and the drum and the chimney tilted by means of the handle 8 to allow access to the wick. Alfter the burner has been lighted, the section 5b is elevated so as to direct the heated gases close to the bottom of the utensil to be heated.

l claim as my invention:

l. In an oil stove, the combination with a fixed top having a grate, and a burner stationarily supported below the grate, of a unitary heat-conducting device carried solely by the burner and comprising a chimney, a drum surrounding` the chimney so as to provide an annular air space between the chimney and drum, the lower ends of said chimney and drum being rigidly secured together and there being air inlet openings communicating with the lower part oi said Space, said chimney and drum being' mounted to tilt upwardly about a pivot point near their lower edges so as to provide a space to give access to the burner, and a tubular npper section freely movable relative to the upper end of the drum and adapted to be supported thereby either in a lowered position such as to permit of a tilting of the device upon its support unrestrained by the grate or in operative position immediately adjacent the underside of the grate.

2. In an oil stove including a lixed grate and a burner stationarily supported below the grate, a drinn. supported upon the burner so as to be tiltable thereon and comprising a lower section, an upper section, and means lor supporting the upper section upon the lower section either in position with its upper end terminating a sullicient distance below the grate to permit the drinn to be tilted, or in position with its upper end near or in contact with the grate to prevent the l'ree escape oi heat between the drum and grate, said means being adapted to permit the Alree movement of the upper section relative to the lower section lfroni one of said positions to the other and eomprising a pin mounted upon one section, there being an inclined slot in the other section having a notch at one end l'or receiving' the pin whereby to prevent the pin 'l'rom sliding in one direction in the slot.

In testimony whereof l have hereunto set my hand.

RUDOLPH HOFFMAN. 

